Figure 2.
Behavioral tasks a, Four-direction Center-Out task used by Patients 1 and 2. b, Superimposed hand trajectories of one patient for movements in all four directions during one experiment. c, Go/NoGo task used by Patient 3. Left, Behavioral ‘Go’ task, indicated by the green dot. Right, ‘No Go’ indicated by red dot. Note the subject must remember if the trial is a ‘go’ or ‘no go’ trial, but has no indication of direction during the delay. IS1: Instructional Stimulus 1; IS2: Instructional Stimulus 2.